Through phone text message feedback I saw that the temperature was not getting hot enough last week so I came in that evening and just switched the output from the 6602 to one of the counters on the MIO board. This fixed the problem.
All three PCs have very similiar hardware. They also have the same versions of Measurement Studio and DAQmx (Nov, 2005). I'm not sure why we use 6602s when we already have 2 counter/timers on each system.
Our DAQ guy is going to play with this card and see if he can acheive the same results. I doubt he will since it was intermittent, but as long as the cell is running I'm OK. Perhaps we may send it back for refurbishing and you guys can find the problem??
Programming Data Acquisition and Control in Measurement Studio and Labwindows/CVI